134 lines
2.9 KiB
Plaintext
134 lines
2.9 KiB
Plaintext
set enable_seqscan=off;
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CREATE TABLE test_bool (
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i boolean
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);
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INSERT INTO test_bool VALUES (false),(true),(null);
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CREATE INDEX idx_bool ON test_bool USING gin (i);
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SELECT * FROM test_bool WHERE i<true ORDER BY i;
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i
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---
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f
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(1 row)
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SELECT * FROM test_bool WHERE i<=true ORDER BY i;
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i
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---
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f
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t
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(2 rows)
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SELECT * FROM test_bool WHERE i=true ORDER BY i;
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i
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---
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t
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(1 row)
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SELECT * FROM test_bool WHERE i>=true ORDER BY i;
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i
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---
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t
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(1 row)
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SELECT * FROM test_bool WHERE i>true ORDER BY i;
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i
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---
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(0 rows)
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SELECT * FROM test_bool WHERE i<false ORDER BY i;
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i
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---
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(0 rows)
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SELECT * FROM test_bool WHERE i<=false ORDER BY i;
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i
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---
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f
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(1 row)
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SELECT * FROM test_bool WHERE i=false ORDER BY i;
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i
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---
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f
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(1 row)
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SELECT * FROM test_bool WHERE i>=false ORDER BY i;
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i
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---
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f
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t
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(2 rows)
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SELECT * FROM test_bool WHERE i>false ORDER BY i;
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i
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---
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t
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(1 row)
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EXPLAIN (COSTS OFF) SELECT * FROM test_bool WHERE i<true ORDER BY i;
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QUERY PLAN
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-------------------------------------------
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Sort
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Sort Key: i
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-> Bitmap Heap Scan on test_bool
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Recheck Cond: (i < true)
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-> Bitmap Index Scan on idx_bool
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Index Cond: (i < true)
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(6 rows)
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EXPLAIN (COSTS OFF) SELECT * FROM test_bool WHERE i<=true ORDER BY i;
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QUERY PLAN
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-------------------------------------------
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Sort
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Sort Key: i
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-> Bitmap Heap Scan on test_bool
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Recheck Cond: (i <= true)
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-> Bitmap Index Scan on idx_bool
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Index Cond: (i <= true)
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(6 rows)
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EXPLAIN (COSTS OFF) SELECT * FROM test_bool WHERE i=true ORDER BY i;
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QUERY PLAN
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-------------------------------------------
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Sort
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Sort Key: i
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-> Bitmap Heap Scan on test_bool
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Recheck Cond: i
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-> Bitmap Index Scan on idx_bool
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Index Cond: (i = true)
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(6 rows)
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EXPLAIN (COSTS OFF) SELECT * FROM test_bool WHERE i>=true ORDER BY i;
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QUERY PLAN
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-------------------------------------------
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Sort
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Sort Key: i
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-> Bitmap Heap Scan on test_bool
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Recheck Cond: (i >= true)
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-> Bitmap Index Scan on idx_bool
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Index Cond: (i >= true)
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(6 rows)
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EXPLAIN (COSTS OFF) SELECT * FROM test_bool WHERE i>true ORDER BY i;
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QUERY PLAN
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-------------------------------------------
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Sort
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Sort Key: i
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-> Bitmap Heap Scan on test_bool
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Recheck Cond: (i > true)
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-> Bitmap Index Scan on idx_bool
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Index Cond: (i > true)
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(6 rows)
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-- probably sufficient to check just this one:
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EXPLAIN (COSTS OFF) SELECT * FROM test_bool WHERE i=false ORDER BY i;
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QUERY PLAN
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-------------------------------------------
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Sort
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Sort Key: i
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-> Bitmap Heap Scan on test_bool
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Recheck Cond: (NOT i)
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-> Bitmap Index Scan on idx_bool
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Index Cond: (i = false)
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(6 rows)
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